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Run: 2026-03-09-01KK9Q5B8S8ZT0FVQQMN5XC48T
Run Details
Model:
GPT-5.4 (Reasoning)
Test:
N-Length Sentences
Scenario:
Write sentences with 20 words each
Duration:
23.7s
Cost:
$0.018238
Provider:
OpenAI
Evaluation summary
Score
Evaluator
Details Link
100.00%
Matches word count
(details)
Model input
User/Human
Please write the opening scene of a murder mystery where each sentence has exactly 20 words. Please make sure that each sentence has the same length. Only return the opening itself.
Model response
Messages
Meta
AI
Rain worried the mansion windows as Inspector Vale arrived, summoned before dawn by a trembling butler clutching a bloodstained candlestick. Inside, the grand foyer smelled of lilies and gunpowder, while the family portraits watched like jurors awaiting a verdict silently. Lady Haversham lay beneath the staircase, pearls scattered across marble steps like frozen tears, her throat cut with precision neatly. Her four guests stood nearby in nightclothes and secrets, each pale face reflecting candlelight differently, as though rehearsing innocence already. A clock chimed six, and nobody flinched except the widow's terrier, who growled softly toward the locked music room door. Vale removed his gloves, studying their eyes before the body, because murder usually announced itself there first, unmistakably to him. Then the butler whispered that the victim had hosted a séance nightly, and tonight one guest had arrived already dead.
created_at
"2026-03-09T16:33:53.954Z"
3/9/2026, 4:33:53 PM
model
"openai/gpt-5.4-20260305"
app_id
182717
external_user
(null)
streamed
true
cancelled
false
latency
22116
moderation_latency
(null)
generation_time
23564
tokens_prompt
46
tokens_completion
670
native_tokens_prompt
41
native_tokens_completion
1209
native_tokens_completion_images
0
native_tokens_reasoning
1021
native_tokens_cached
0
num_media_prompt
(null)
num_input_audio_prompt
(null)
num_media_completion
0
num_search_results
(null)
origin
"https://ncbench.com/"
is_byok
false
finish_reason
"stop"
native_finish_reason
"completed"
usage
0.0182375
router
(null)
provider_responses
0
endpoint_id
"9ff5625c-403f-4d7f-b895-58ac7295062c"
id
"resp_0f76cdef9a95b3950169aef6720d1c8190b460b92f126d4085"
is_byok
false
latency
236
model_permaslug
"openai/gpt-5.4-20260305"
provider_name
"OpenAI"
status
200
user_agent
"langchainjs-openai/1.0.0 ((node/v24.14.0; linux; x64))"
http_referer
(null)
api_type
"completions"
id
"gen-1773074033-n4Q02vSTcEImaFvV5UGI"
upstream_id
"resp_0f76cdef9a95b3950169aef6720d1c8190b460b92f126d4085"
total_cost
0.0182375
cache_discount
(null)
upstream_inference_cost
0
provider_name
"OpenAI"
Evaluation details
Result
Evaluator
Details
Meta Data
100.00%
Matches word count
n/a
neededClean
false
sentences
7
wordCounts
0
20
1
20
2
20
3
20
4
20
5
20
6
20